Improvement in steam-generators



UNITED STATES PATENT OFFICE.

WILLIAM BAXTER, 0E NEWARK, NEW JERSEY.

IMPROVEM ENT IN STEAM-GENERATO RS.

Speciiicatiou forming part of Letters Patent No. 83,445, dated October27, 1868.

To all whom 'it may concern:

Be it known that I, WILLIAM BAXTER, of Newark, in the county of Essexand State of N ew Jersey, have invented a new and useful Improvement inSteam-Boilers; and I do hereby declare the following to be a full,clear, and exact description thereof, which will enable those skilled inthe art to make and use the same, reference being had to theaccompanying drawing, formiu g part of this specification, in whichdrawing Figure l is avertical central section of this invention. Fig. 2is a horizontal section thereof. i

Similar letters indicate correspon ding parts.

This invention relates to a steam-boiler the lire-box of which isprovided with descending ilues or fire-tubes passing through thewaterspace, which is surrounded by a smoke-chamber and surmounted by asteam-dome in such a manner that a boiler is obtained With a very largeheatin g-surface contracted in the sm allest possible space, theiiirebeing compelled to pass in an up-andldown zigzag course through andaround the water-space without heilig permitted to pass up through orcome'in contact with the steam-space of the boiler.

A represents the fire-box of my boiler, which is provided With a. grate,B, in its bottom and with a combustion chamber, G, in its top. Saidfire-box and its combustion-chamber are surrounded and covered by thewater-space E, and from the combustion-chamber C extend the tubes Dthrough the Water-space in a downward direction into the gas-chamber H,which surrounds the ash-box I and forms the bottom of the main part J ofthe boiler. This part is surrounded by a jacket, F, forming asmoke-chamber, G', through which the heated gases rise, and whichconnects by a flue, K, with the smoke-stack. This smoke-chamberterminates below the Water-line of the boiler, the jacket F being soformed that it closes up against the main part of the boiler about at alevel with the top of the fire-box, as shown in Fig. l of the drawing.The upper portion of the main partJ forms the steam-dome G, which isclear above the tire, as shown.

The re or the heated products of combustion on rising from the gratespread in the combustion chamber C; then they descend through the tubesD and rise again through the smoke-chamber Gr', as indicated in Fig. 1of the drawing, and by these means a very large heatingsurface isobtained, and, furthermore, a complete combustion is effected, theheating-surface being composed of the entire area of the tire-box, thecombined area of the tubes D, and the area of the main part J as far asthe saine is inclosed by the jacket F, and the complete combustion ofthe gases being eected in the successive passage of said gases throughthe chambers C, H, and G.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

The arrangement of the tire-box A, lues D, jacket F, pipe K, andsteam-dome Gr, substantially as set forth.

WILLIAM BAXTER.

Witnesses:

In:IcEsTER ALLEN,

W. HAUEE.

